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Process for purifying coal tar through centrifugation method and preparing needle coke by using coal tar

A needle coke raw material, coal tar technology, applied in the field of coal chemical industry, can solve the problems affecting the quality of graphite electrodes, limited QI removal efficiency, etc., achieve high separation efficiency, reduce costs, and improve economic efficiency

Active Publication Date: 2012-12-26
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the removal efficiency of QI by the centrifugal method in the prior art is limited, thereby affecting the quality of the graphite electrode, the present invention provides a process for purifying coal tar by centrifugal method and preparing needle coke raw material by using coal tar. The needle coke raw material prepared by the process described in the present invention has lower QI content and higher hydrocarbon content

Method used

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  • Process for purifying coal tar through centrifugation method and preparing needle coke by using coal tar
  • Process for purifying coal tar through centrifugation method and preparing needle coke by using coal tar

Examples

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Effect test

Embodiment 1

[0042] In the process for purifying coal tar by centrifugal method described in this example, the relative centrifugal force for centrifugal separation is 2500G; the temperature of the coal tar for centrifugal separation is 40°C, the viscosity is 30mpa·s, and the time for centrifugal separation is 2min .

Embodiment 2

[0044] In the process of purifying coal tar by centrifugal method described in this example, the relative centrifugal force for centrifugal separation is 3500G; the temperature of the coal tar for centrifugal separation is 50°C, the viscosity is 100mpa·s, and the time for centrifugal separation is 1.5 min.

Embodiment 3

[0046] In the process for purifying coal tar by centrifugal method described in this example, the relative centrifugal force for centrifugal separation is 2900G; the temperature of the coal tar for centrifugal separation is 200°C, the viscosity is 50mpa·s, and the time for centrifugal separation is 1.5 min.

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Abstract

The present invention provides a process for purifying coal tar through a centrifugation method. The process is characterized in that a viscosity of the centrifugated and separated coal tar is 30-100 mpa.s. According to the present invention, the viscosity of the coal tar is set to 30-100 mpa.s, and the viscosity is further preferably 50-100 mpa.s so as to effectively improve removing efficiency of QI particles in the coal tar.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a process for centrifugally purifying coal tar and using coal tar to prepare needle coke raw materials. Background technique [0002] Needle coke is a high-quality material for manufacturing high-power and ultra-high-power electrodes. Graphite electrodes made of needle coke have strong thermal shock resistance, high mechanical strength, good oxidation performance, low electrode consumption and large allowable current density, etc. advantage. The needle coke currently produced can be divided into two categories: petroleum-based needle coke and coal-based needle coke according to the different raw materials used. The Great Lakes Carbon Company of the United States first developed the production process of petroleum-based needle coke in the 1950s. However, due to the trend of petroleum processing towards the direction of catalytic cracking and light-weight deep pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/00C10C1/14C10C1/16C10C3/00C10C3/02C10C3/08C10G67/02C10G31/10
Inventor 井口宪二坂脇弘二
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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